參數(shù)資料
型號： XRT73LC04A
廠商： Exar Corporation
英文描述： 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
中文描述： 4通道DS3/E3/STS-1線路接口單元
文件頁數(shù)： 55/64頁
文件大?。?/td> 360K
代理商： XRT73LC04A
XRT73LC04A
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 1.0.1
51
When the Transmit Drive Monitor circuitry within a
given line is connected to the line, as illustrated in
Figure 36, then it monitors the line for transitions. As
long as the Transmit Drive Monitor circuitry detects
transitions on the line via the MTIP_(n) and
MRing_(n) pins, then it keeps the DMO (Drive Moni-
tor Output) signal "Low". If the Transmit Drive Moni-
tor circuit detects no transitions on the line for 128+32
TxClk periods, then the DMO (Drive Monitor Output)
signal toggles "High".
N
OTE
:
The Transmit Drive Monitor circuit does not have to
be used to operate the Transmit Section of the
XRT73LC04A. This is purely a diagnostic feature.
4.6
T
HE
TAOS (T
RANSMIT
A
LL
O
NE
S) F
EATURE
The XRT73LC04A can command any channel to
transmit an all “1’s" pattern onto the line by toggling a
single input pin or by setting a single bit-field within
one of the Command Registers to "1".
N
OTE
:
When this feature is activated, the Transmit Section
of the configured channel overwrites the Terminal Equip-
ment data with this all “1’s" pattern.
a. Operating in the Hardware Mode
Configure Channel(n) to transmit an all “1’s" pattern
by toggling the TAOS_(n) input pin (pin 45, 46, 135 or
136) “High". Terminate the all “1’s" pattern by tog-
gling the TAOS_(n) input pin “Low".
b. Operating in the HOST Mode
Configure Channel(n) to transmit an all “1’s" pattern
by writing to Command Register CR1-(n) and setting
the TAOS_(n) bit-field (bit D3) to "1".
COMMAND REGISTER CR1-(n)
Terminate the all “1’s" pattern by writing to Command
Register CR1-(n) and setting the TAOS_(n) bit-field
(D3) to "0".
5.0
THE MICROPROCESSOR SERIAL INTER-
FACE
The on-chip Command Registers of XRT73LC04A
DS3/E3/STS-1 Line Interface Unit IC are used to con-
figure the XRT73LC04A into a wide-variety of modes.
This section discusses the following:
1. The description of the Command Registers.
2. A description on how to use the Microprocessor
Serial Interface.
5.1
D
ESCRIPTION
OF
THE
C
OMMAND
R
EGISTERS
(repeated as Table 7), lists the Command Registers,
their Addresses and their bit-formats.
F
IGURE
36. T
HE
XRT73LC04A
EMPLOYING
THE
T
RANSMIT
D
RIVE
M
ONITOR
F
EATURES
R1 = 31.6
R2 = 31.6
Channel (n)
TxPOS_(n)
TxNEG_(n)
TxLineClk_(n)
TTIP_(n)
TRing_(n)
TPData_(n)
TNData_(n)
TxClk_(n)
Only One Channel Shown
1:1
J1
BNC
MTIP_(n)
MRing_(n)
R3 = 270
R4 = 270
D4
D3
D2
D1
D0
TxOFF_(n) TAOS_(n) TxClkINV_(n) TxLEV_(n) Reserved
0
1
X
X
X
相關(guān)PDF資料
PDF描述
XRT73LC04AIV 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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XRT73LC04A_08 制造商:EXAR 制造商全稱:EXAR 功能描述:4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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